Exploiting Polarization Wobble in Sinuous Antennas for the Detection of Linear Scatterers in Ground Penetrating Radar Applications

Cross- polarized returns are desirable for detecting buried asymmetrical targets with GPR systems in order to increase sensitivity. However, measuring cross-pol returns can be strongly dependent on orientation angle due to polarization mismatch. The fields transmitted by sinuous antennas are known to exhibit polarization wobble over frequency. This is often considered an undesired characteristic; however, this behavior can be exploited in order to mitigate the strong dependence of the cross-pol returns on the orientation angle.